Fuse and cut-out mechanism



.Patented Mar.. 2, 192e.;

UNITED .aunar B. nYPiNsKI, or

LAUBELTON, NEW YORK, assIGNon lro rnom'as E. MUmY;

or BROOKLYN, NEW YORK; i

FUSE AND cur-our MEcKANIsM.

A 'Application mea may 1s, 1924. semi No. 713,663.

To all who/m 'it mary concern! Beit known uthat, I,ALBERT RYPINSKI, a citigen of the-United States, -and resident of Laurelton, Long'lsland, `New York, havel invented: certain new and useful Improvements in Fuse and Glut-OutMechanism, of

which the following is a specification.

My invention aims to provide certain improvements'in fuse and cut-out mechanisms such as are generally used'in entrance boxes for electriccircuits.

The accompanying drawings illustrate an embodiment of Vthe invention.

Fig. 1 is aplan part-ly broken away; Figs. 2 and 3 are vertical sections approximately on the correspondingly numbered other support.

lines in Fig. '1. f

Referringtothe embodiment of the invention illustrated, the various parts are -mounted on a block of porcelain or similar non-conducting material which is adapted to befastened on the bottom 1 ofv a box or The block`2 of porcelain is of approximately rectangular shape in plan and is formed with certain grooves and barriers for .mounting the `terminals and preventing short circuits' between them. In'

F i 1 there are indicated screws 3 for attaming the block to bosses 4 on the support 1.

` A shallow groove or recess 5 is formed atlone slide of the block surrounded by a' raised barrier .6. In this groove is located a terminal plate 7 riveted or otherwise fastened Aon the porcelain block and having threaded through it a binding screw 8 for the end of a wire. The terminal 7 is bent upward at one edge and carries a\pair of spring contacts 9.

At the other side of the same end of the block there is a groove or recess 10 at a lower level and in which is mounted a terminal 11 carrying a. binding screw 12a, this terminal being projected V.upward at one side and car a pairof spring contacts 12 at a lower levelthan the contacts 9. The two pairs of contacts9 and 12 areintended to be bridged by a fuse as hereinafter described. At the other side of the center of the block from the two fuse contacts, there are grooves 13 and '14 separated from each other by' a barrier 15. At each end of the groove 13 there isa deeper recess, these recesses carrying terminal plates 16 and 17 fastened in place-and Vprovided with binding screws for the ends of wires. The two plates 1e and '17 are bridged a their' innerfenas b' astrip 18 fastened to the. porcelain'bloc bv means ofl screws shown. These terminals 16 and 17 with their' detachable coli-4 i necting strip 18 ma provide a means of opening the circuit 1n meter testing. The

.barrier is formed. at an intermediate point in its length with an elevated portion 19 serving as pressedand carry terminal plates 20 and-21 for the neutral of a two-wire circuit, one plate serving ahead of the meter', and one after the meter, each. of these plates being provided with a pair ofv binding screws for astop and referred to hereinaften The 'ends of the groove 14 are also' de-l the incoming and outgoing wires respec! tively. The equipment vof terminals and bridges or cut-outs above described is a' common one. There are various others in use, some simpler and some involving a more complicatedarrangement. Generally 'speaking, the invention is applicable to various arrangements of the usual or suitable types.A

An important feature of the present 1nvention is the-mountingl of the fuse and connections. y On a central bo of the'base or block 2, there is mounted a rocking `arm of porcelain carrying the fuse and fuse terminals. The fuse-carrying arm Vhas a hub 22 through which passes a -hollo shaft 23 anged over the top of the hub 2 with a reduced lower end entering the base block 2. A nut 24 located in a socket on the underside of the base block is threaded on to the lower end of the hollow shaft 23. The rockin arm is preferably of porcelain, and a met plate 25 is interposed between it and the base block 2 toreduce friction. The end ofthe porcelain arm is formed as a socket 26 for the fuse. The fuse may be of various types. An ordinary fuse 27 is shown of porcelain with a threaded metal ring 28 around it and with a metal button 29 at the end, these two parts being connected by a fuse inside the l block. In the socket 26 is carried a threaded In the position of the vparts shown, the

-Afuseilis connected between the terminals 7 swinging arm, so that .arm is pivoted on the elevated and 11. When it is to be disconnected, the

porcelain arm is swung about the pivotal shaft 23 (upward in Fig. l), until blade 33 or other part/strikes the stop 19. In this position the terminals 31 and 33 are widely removed from the switch plates 9 and 12, the blade 31 swinging clear above the contacts 12 as will be clear from Fig. 3. The

central portion of the block 2 -so as to swing clear above all the contacts at the side opposite the fuse terminals. l

In the position of use the permanent connections are entirely unobstructed by the access can be easily had thereto with-a screw driver. And for manipulating the terminals 7 and 11 or the binding screws thereof access is also easier because the end ofthe arm is only big enough to enclose the fuse and because the terminals 7 and 11 are located outside of the periphery of the end of the arm. Or the arm may be swung to the opposite posltion to give easier access to -these parts.

' The rocking arm may be operated by various devices such, for example, as the operating lever pivoted to the cover illustrated in an application of Emil T. Hagist, N o. 718,326, filed June 6, 1924, or by devices similar to those described in an aplication of Thomas E. Murray No. 556,818, Eled April 25, 1922, and an application of Murray and Blackwood, No. 587,189 filed September 9, 1922. The invention may be applied .in whole or in part to mechanisms employing two or more fuse sockets and sets of switch contacts. v The provision of the fuse socket and hub of the arm in an integral structure of insulating Y material simplifies the construction greatly. The extending of the rocking arm to one side only of its axis facilitates easy access to the terminals arranged on one side of the block'and, when the arm is shifted. to the open position,vto the switch contacts located on the op osite side of the block. And such access is urther facilitated by the mounting of the arm ata point between the switch contacts 9 and 12 at one side and the terminals with binding posts at the other side and by the capacity of the arm to rock to a range greater than 90 degrees.

yThough I have described with great particularity of detail a certain embodiment of of the casing-` and having a range my invention, yet .it is not to be understood therefromthat the invention is restricted to the particular. embodiment disclosed. Various modifications thereof in detail and in the arrangement of the parts may be made by those skilled in the art without departure from the invention as defined in the following claims.

v1'. A cut-out mechanism including in combination a base block and a rocking arm mounted on said block and comprising in an integral structure of insulating material a pivoted hub and a fuse socket, said hub being pivoted about an axis transverse to the face of the base block.

2. A cut-out mechanism including in combination a base block and a rocking arm mounted on -said block carrying a. fuse socket and switch contacts for co-operation with contacts mounted directly on the base block, said arm movin in a path substantially parallel with the Iace of the base block and having a Irange of movement greater than ninety degrees.

3. A cut-out mechanism including in combination a base block and a rocking arm mounted on said block comprising an integral structure of insulating material carrying a pair of vfuse terminals and carrying switch contacts for co-operation with contacts mounted directly on the base block, said arm extending to one side only of its axis.

4:. A cut-out mechanism including in combination a base block and a rocking arm mounted on said block carrying a fuse socket and .switch contacts for co-operation with contacts mounted directly on the base block, said arm moving in a path substantially parallel with the face of the baseblock and extending to one side only of its axis of movement greater than ninety degrees. l

A cut-out mechanism including in combination a base block carrying switch contacts at one side and terminals at the opposite side, a rocking arm mounted on said block at a point between said switch contacts and said terminals carrying a fuse socket and contacts for co-operation with the switch contacts on the base block.

In witness whereof, I have hereunto signed my name.

ALBERT B. RYPIN SKI. 

